Circular saw



Patented pr, 1929.

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RICHARD c. CHARLTON, or PHILADELPHIA, PENNaYLvAinrA7- APSSIGNOR To HENRY DIssToN e, SONS, INCORPORATED, or' PHILADELPHIA, PENNSYLVANIA, A CORPO- RATION OF PENNSYLVANIA.

The object of lmy invention is to provide' a simple and effective means for retainmg insertable saw-tceth in the body ot circular saw. In the accompanying drawmg Fig. lis-a side view-,of a .portionof a cu'- cular saw, showing the teeth'in position and locked by the wedges; y Fig. 2 is a view showing a tooth being forced into a tooth-recess ofethe body of a circular saw; l Fig. 3 is an edge View of a tooth;

4 is a side view of .a tooth; Fig. 5j ,is an edge View of a Wedge;

6 is a side View of a; Wedge; and 7 is a sectional View of thel body of the saw on the line 7'-7, Fig. 2.

1 is the body of a circular saw 'having deep gullets 2. Extending into each gu-llet `2O. is a tooth-recess 3 and a wedgerecess 4. separated by a comparatively narrow section 5 of the saw body.

The base ot' each tooth-recess is preferably rounded, and the inner end of the wedge-A recess terminates in` a circular enlargement as shown at 6, Fig. 2.

Therev is snfiicient springr of the metal 'of the blade to allow the teeth` 'to be forced' into the recesses 3 as shown in Fig". 2'.

. atthc inner end to tit the end of the recess `3 and provided witlra chisel poi-nt 8 at its outer end in the present instance. At the back of the tooth is a rib 9 fitting); a groove -10 in the body of the saw. There is also a groove 10` in the irontlwall of the recess which is a continuation of the groove 1() in the present instance.

OIRO'UL-AH SAW.

.tain the tooth in position. In order to positively lock the teeth to 1'6 at each side which enter grooves 17 in Each tooth 7 has a body portion rounded" Appncation iea'meeember 12, 1921. serial No. 239,518.,

the tooth' is in position the portion iwill spring back, so that the shoulder 11 will extend over the end of the rib 9 and will rethe body of the saw a wedge 14 is provided, which is driven in to the recess 4. The inner end of the wedge' is split at'15 and has ribs each wall of the recess 4. When the Wedge is driven to its full extent, the shoulders 18 y formed on the inner end of the Wedge engage the body at the 'circular enlargement. thus ,fl

`- retaining the Wedge in position. The Wedge.r ,'60

forces the portion 5' of the body againstlv the "j tooth, firmly holding the tooth in position. ".By the above-described construction, a comparatively simple and effective means isT` provided for holding insertable saw-teeth in the body of a saw. 4.

When it is desired to remove a tooth, the inner ends of the IWedge are drawn together so that the shoulders 18 clearthe body, after which the Wedge can-be forcedout of its re cess. ,This leaves the-portion 5 ofthe body :tree to yield' when forceis applied to the 4 tooth.` f

In the present instance each tooth has a .Y notch 19 at its inner end for a removing' tool.

I claim: I The combination in a saw, of a body portion having gullets spaced apart and having;rv a tooth-recess and a Wedgerecess spaced. apart and extending into each gullet; a groove in both Walls of each tooth-recess, Vthe `groove in the front wall terminating in a RieHARDo. CHARLTON 

